CN205847120U - Secondary side voltage-reducing constant-current flyback power converter - Google Patents
Secondary side voltage-reducing constant-current flyback power converter Download PDFInfo
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- CN205847120U CN205847120U CN201620802542.5U CN201620802542U CN205847120U CN 205847120 U CN205847120 U CN 205847120U CN 201620802542 U CN201620802542 U CN 201620802542U CN 205847120 U CN205847120 U CN 205847120U
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- constant current
- output
- siding ring
- voltage
- secondary side
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- 238000012937 correction Methods 0.000 claims abstract description 26
- 230000000694 effects Effects 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 20
- 230000036772 blood pressure Effects 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 208000032365 Electromagnetic interference Diseases 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 208000003464 asthenopia Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000013632 homeostatic process Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/385—Switched mode power supply [SMPS] using flyback topology
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/375—Switched mode power supply [SMPS] using buck topology
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses a secondary side step-down constant current's formula of speeding power converter that returns, it adopts doublestage isolated circuit framework and outputs invariable output current and drives a low-power LED module, its elementary adoption is the formula of speeding circuit framework of returning of side correction voltage, secondary adoption is equipped with a step-down circuit framework of a constant current ware, make in elementary steady voltage's conversion back, through this output current of this constant current ware sensing load effect on this LED module and adjust output cycle, with invariable this output current's output total amount, thereby reduce the ripple amplitude, realize not having the stroboscopic output result and promote the illuminating effect of this LED module.
Description
Technical field
This utility model relates to LED (Light Emitting Diode, light emitting diode) light fixture power-supply device technology
Field, especially with regard to the flyback power converter of a kind of secondary side blood pressure lowering constant current, to correct (Primary by primary side
Side Regulation, PSR) voltage control architecture combined secondary side correcting current output framework concept, make power supply turn
Parallel operation output has the constant current of low ripple amplitude, thus solves LED lamp stroboscopic problem.
Background technology
At present, the most expansionary LED light source because of the demand of its physical characteristic, when driven for emitting lights need one can will hand over
Stream electricity is converted to galvanic power supply changeover device, in various power supply changeover device, and switch type power converter (Switch Power
Supply, SPS) because having that efficiency is high, volume is little, lightweight, be easily assembled and the characteristic such as output voltage range is big and be widely used
In such as liquid crystal display, TV or LED lamp, it typically has boost type (Boost), buck (Buck), flyback
(Fly-back), the circuit framework such as forward type (Forward) and push-pull type (Push-pull), central, flyback circuit is more because of tool
There is circuit ripe and easily reach to organize the features such as output more and be common in the application of LED lamp.Further, since the power of application
Limit, low-power LED lamp frequently with single-stage converter, high-power LED lamp the most commonly used twin-stage transducer.
Power supply changeover device 1 as shown in Figure 1 i.e. uses single-stage flyback circuit framework, and utilizes pulse wave width modulation
The big of an operating current (Io) of multiple LED2 is given in the control mode regulation output of (Pulse Width Modulation, PWM)
Little, make the plurality of LED 2 work in the pattern determined electric current Yu determine power, thus there is stable lighting quality.But, this kind passes
System power-switching circuit except output this operating current there is bigger ripple in addition to, there is also adjustment of load precision low,
The problems such as 120Hz stroboscopic problem and electromagnetic interference (ElectroMagnetic Interference, EMI).
Therefore, this power supply changeover device 1 also can be as in figure 2 it is shown, use tool power factor (Power Factor, PF) to correct
Twin-stage flyback circuit framework, its transformator 10 has a first siding ring (NP), a second siding ring (NS) and a reference line
Circle (NA), this first siding ring is electrically connected with a bridge rectifier 11, and this first siding ring and this reference coil are electrically connected with
One power factor control chip (PF Control IC, PFC IC) 12.This second siding ring is electrically connected by an outputting inductance 13
Meet the plurality of LED 2, and this second siding ring and this outputting inductance 13 are electrically connected with circulation DC control chip (DC/DC always
IC) 14, this outputting inductance 13 is electrically connected with this PFC IC 12 by a photo-coupler (Optical Coupler) 15 again.This electricity
After source converter 1 utilizes this transformator 10 to change the input voltage of this bridge rectifier 11 rectification output, through this outputting inductance 13
Conversion forms the running voltage needed for the plurality of LED 2.Meanwhile, this power supply changeover device 1 utilizes this photo-coupler 15, this DC/
DC IC 14 and this PFC IC 12 monitors the output pressure value of this running voltage, controlling the working cycle of this first siding ring and
Affect the pressure value size of this second siding ring output, it is achieved stably export the effect of this running voltage.But, this kind is by this light
Bonder 15 realize electrical isolation and secondary side electrical signals feedback the circuit framework controlled generally exist number of elements used many,
The big problem such as the highest with integrated level of circuit volume, and this photo-coupler 15 element itself has and easily consumes, in temperature and aging change
The problems such as the performance extremely unstable during change so that its application enjoys limitation, in other words, this kind of circuit framework extremely complicated and
With high costs, it is unfavorable for industry expansive approach.
Thoughts on this, existing existing electronic component how is utilized to improve the circuit framework of isolated power converter, from
And make it in the case of without optical coupling element back coupling secondary side load information, still can control the homeostasis exporting electric current with stable
Property, to reach to guarantee that power supply changeover device output promotes economic benefit without having the advantage of low cost while stroboscopic, it is this
The problem that utility model is probed into.
Utility model content
Because problems of the prior art, the purpose of this utility model is to provide a kind of secondary side blood pressure lowering constant current
Flyback power converter, in LED flat lamp, LED Recessed light or LEDbulb lamp, thus solve to illuminate stroboscopic and ask
Inscribe, avoid causing people eyestrain to injure with vision.
According to the purpose of this utility model, the flyback power converter of this secondary side blood pressure lowering constant current uses twin-stage isolated
Circuit framework also is used for driving a lower powered LED module, to realize exporting without stroboscopic, thus promotes this LED module illumination effect
Effect of fruit.This flyback power converter comprises an input module, a modular converter and an output module, this modular converter
It is electrically connected with this input module and this output module, and uses flyback circuit framework and be provided with a first siding ring, a correction
Coil, a corrector, an iron core and a second siding ring, this output module uses buck circuit framework and is provided with a constant current again
Device.This first siding ring and this correcting coil are placed in the primary side of this iron core, and this second siding ring is placed in the secondary side of this iron core,
And this first siding ring is electrically connected with this input module, this corrector is electrically connected with this first siding ring and this correcting coil, should
Output module is electrically connected with this second siding ring and this LED module.This input module is electrically connected with an external power source and exports one
Input current, after making this first siding ring accept this input voltage, this second siding ring forms an output by this iron core magnetic strength
Voltage forms an output electric current for the conversion of this output module and gives this LED module.Meanwhile, this correcting coil is by this iron core magnetic strength shape
Become a correction signal, thus regulate the working cycle of this first siding ring for this corrector, and this constant current device senses this output
Electric current regulates the working cycle of this output voltage after the load effect on this LED module, thus this output electric current constant is defeated
Go out total amount, to reduce the ripple amplitude of this output electric current.
Wherein, this modular converter lies in the secondary side of this iron core and is provided with certain streamline circle, and this constant current coil is electrically connected with should
Output module, and form a constant current voltage by this iron core magnetic strength, thus for this constant current device as the ginseng regulating this output voltage
Examine benchmark.This constant current device can be provided with a sensing element, and this sensing element is at least formed by two resistor coupled in parallel, and this sensing element
Sense this output electric current load effect on this LED module and form a sensing value, regulate this output ordering about this constant current device
The working cycle of voltage.This constant current device is additionally provided with a constant current chip and constant current switch, and this constant current chip is electrically connected with this constant current
Coil, this constant current switch and this sensing element, regulate this constant current switch after being used for receiving this constant current voltage this sensing value of comparison
Working cycle, thus correct the output cycle time of this output voltage, to realize determining effect of electric current.
Further, this corrector is provided with a correcting chip, a correction switch and a detecting element, and this detecting element is electrically connected with
This correcting coil and this correcting chip, and this correction switch is electrically connected with this correcting chip and this first siding ring, when this correction
This input current of coil magnetic strength and when obtaining a correction voltage, this detecting element detects this correction voltage and forms this correction signal also
This correcting chip is given in feedback, makes this correcting chip regulate the working cycle of this correction switch, thus corrects this first siding ring and connect
Receive the cycle time of this input current, to realize determining effect of voltage.
In sum, this utility model by the way of reverse thinking by known flyback power-switching circuit and blood pressure lowering
Formula power-switching circuit is applied in LED lamp, after utilizing primary PSR flyback circuit burning voltage, by secondary blood pressure lowering
Formula circuit constant output current and effectively reduce ripple amplitude, it is achieved without the lamp lighting effect of stroboscopic.Further, since this practicality
Novel secondary side uses buck circuit framework, and therefore circuit voltage is relatively low, thus can directly use existing existing
Electronic component and control chip, be so the advantage with low element cost, thus meets the demand of industrial economy development.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of existing single-stage flyback power converter；
Fig. 2 is the circuit diagram of existing twin-stage flyback power converter；
Fig. 3 is the block chart of present pre-ferred embodiments；
Fig. 4 is the circuit diagram (A) of present pre-ferred embodiments；
Fig. 5 is the circuit diagram (B) of present pre-ferred embodiments.
Description of reference numerals: 1-power supply changeover device；10-transformator；11-bridge rectifier；12-power factor controls core
Sheet；13-outputting inductance；14-DC-DC control chip；15-photo-coupler；2-LED；3-flyback power converter；30-
Input module；300-EMI device；301-bridge rectifier；31-modular converter；310-corrector；3100-correcting chip；3101-
Correction switch；3102-detecting element；32-output module；320-constant current device；3200-constant current chip；3201-constant current switchs；
3202-sensing element；4-LED module.
Detailed description of the invention
For making auditor can have a clear understanding of content of the present utility model, arrange in pairs or groups the most in the following instructions graphic, please refer to.
It is respectively block chart and the circuit diagram of this utility model preferred embodiment as seen in figures 3-5.As it can be seen, secondary
This flyback power converter 3 of side blood pressure lowering constant current uses the isolated circuit framework of twin-stage and for driving a lower powered LED mould
Block 4, to realize exporting without stroboscopic, thus promotes effect of this LED module 4 illuminating effect.This flyback power converter 3 comprises
One input module 30, modular converter 31 and an output module 32, this input module 30 be electrically connected with an external power source (VS) with
This modular converter 31, this modular converter 31 uses flyback circuit framework and is electrically connected with this output module 32, and this output mould
Block 32 uses buck circuit framework and is electrically connected with this LED module 4.This input module 30 can be provided with an EMI (Electro
Magnetic Interference, electromagnetic interference) device 300 and a bridge rectifier 301, one end of this bridge rectifier 301 leads to
Cross this EMI device 300 to be electrically connected with this external power source and accept an alternating current, and its other end electrically connect this modular converter 31,
Export to this modular converter 31 after forming an input current for this alternating current of rectification.
This modular converter 31 is provided with a first siding ring (NP) a, second siding ring (NS), a correcting coil (NA), certain
Streamline circle (NC), an iron core (T) and a corrector 310, and this corrector 310 be provided with one correcting chip 3100, a correction switch
3101 and a detecting element 3102.This first siding ring and this correcting coil are placed in the primary side of this iron core, this second siding ring
With the secondary side that this constant current coil is placed in this iron core, and this first siding ring is electrically connected with this bridge rectifier 301, this correction core
Sheet 3100 switchs 3101 with this correction, and this correcting chip 3100 is electrically connected with this correction switch 3101 and this detecting element 3102,
This detecting element 3102 is electrically connected with this correcting coil, and this second siding ring and this constant current coil are electrically connected with this output module again
32.After this first siding ring accepts this input current, this second siding ring forms an output voltage by this iron core magnetic strength, and should
Output module 32 receives and changes this output voltage formation one output electric current and gives this LED module 4, to drive this LED module 4
Light.Further, this correcting coil forms a correction voltage by this iron core magnetic strength, and this detecting element 3102 receives this correction voltage also
After detection forms this correction signal, this correcting chip 3100 is given in feedback, makes this correcting chip 3100 regulate this correction switch 3101
Working cycle, thus correct this first siding ring and receive the cycle time of this input current, and then affect this second siding ring magnetic
Sense forms the size of this output voltage, to realize the purpose of burning voltage.Meanwhile, this constant current coil is formed by this iron core magnetic strength
One constant current voltage.
This output module 32 is built-in with a constant current device 320, and this constant current device 320 is provided with constant current chip 3200, constant current and opens
Close 3201 and a sensing element 3202, and this sensing element 3202 is at least formed by two resistor coupled in parallel.This constant current chip 3200
It is electrically connected with this constant current coil and receives this constant current voltage, this constant current switch 3201 electric connection this second siding ring, this constant current
Chip 3200 and this sensing element 3202, and this sensing element 3202 is electrically connected with this LED module 4.This constant current device 32 utilizes should
After sensing element 3202 senses this output electric current load effect on this LED module 4 and forms a sensing value, feedback gives this calmly
Stream chip 3200, and this constant current chip 3200 utilize this constant current voltage as this sensing value of basis reference comparison, thus regulation should
The working cycle of constant current switch 3201, receive the cycle time of this output voltage changing this output module 32, the most constant should
Export the output total amount of electric current and realize determining effect of electric current and reducing the ripple amplitude of this output electric current.So, actual survey
Test result is as shown in the table, when the alternating voltage of this external power source is when 90～277 volts (V), and this flyback power converter 3
Power P F at least more than 0.9, overall power supply conversion efficiency also have more than 85%, and its peak point current Vmax only surveys electricity
1.03 times of stream Vrms, the ripple amplitude compared to existing known 1.3～1.6 times is the least a lot of, actually reaches without stroboscopic
Practical application.
The foregoing is only the preferred embodiment of illustrative, rather than be restricted.Any without departing from essence of the present utility model
God and category, and the equivalent modifications carrying out it or change, be intended to be limited solely by the range of this case claim.
Claims (5)
1. a flyback power converter for secondary side blood pressure lowering constant current, it uses the isolated circuit framework of twin-stage and for driving
A lower powered LED module, to realize exporting without stroboscopic, thus promotes the illuminating effect of this LED module, it is characterised in that bag
Contain:
One input module, is electrically connected with an external power source, and this input module exports an input current；
One modular converter, uses flyback circuit framework and is provided with a first siding ring, a correcting coil, a corrector, a ferrum
Core and a second siding ring, this first siding ring and this correcting coil are placed in the primary side of this iron core, and this second siding ring is placed in
The secondary side of this iron core, this corrector is electrically connected with this first siding ring and this correcting coil, and this first siding ring electrically connects
After connecing this input module and accepting this input current, this second siding ring forms an output voltage by this iron core magnetic strength, meanwhile,
This correcting coil forms a correction signal by this iron core magnetic strength, thus regulates the work week of this first siding ring for this corrector
Phase；And
One output module, uses buck circuit framework and is provided with a constant current device, and this output module is electrically connected with this secondary side line
Circle and this LED module, give this LED module to utilize the conversion of this output voltage to form an output electric current, and this constant current device sensing should
Working cycle of this output voltage is regulated after output electric current load effect on this LED module, thus this output electric current constant
Output total amount, to reduce the ripple amplitude of this output electric current.
The flyback power converter of secondary side blood pressure lowering constant current the most according to claim 1, it is characterised in that this modulus of conversion
Block is provided with certain streamline circle in the secondary side of this iron core, and this constant current coil is electrically connected with this output module, and by this iron core magnetic
Sense forms a constant current voltage, thus for this constant current device as the basis reference regulating this output voltage.
The flyback power converter of secondary side blood pressure lowering constant current the most according to claim 2, it is characterised in that this constant current device
Being provided with a sensing element, this sensing element is at least formed by two resistor coupled in parallel, and this sensing element sense this output electric current in
Load effect on this LED module and form a sensing value, regulate the working cycle of this output voltage ordering about this constant current device.
The flyback power converter of secondary side blood pressure lowering constant current the most according to claim 3, it is characterised in that this constant current device
Being provided with a constant current chip and constant current switch, this constant current chip is electrically connected with this constant current coil, this constant current switch and this sensing
Part, regulates the working cycle of this constant current switch after receiving this constant current voltage this sensing value of comparison, thus corrects this output
The output cycle time of voltage, to realize determining effect of electric current.
The flyback power converter of secondary side blood pressure lowering constant current the most according to claim 4, it is characterised in that this corrector
Being provided with a correcting chip, a correction switch and a detecting element, this detecting element is electrically connected with this correcting coil and this correction core
Sheet, and this correction switch is electrically connected with this correcting chip and this first siding ring, when this this input current of correcting coil magnetic strength
When obtaining a correction voltage, the detection of this detecting element forms this correction signal and this correcting chip is given in feedback, makes this correcting chip
Regulate the working cycle of this correction switch, thus correct this first siding ring and receive the cycle time of this input current, to realize
Determine effect of voltage.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW105211247 | 2016-07-26 | ||
| TW105211247U TWM533373U (en) | 2016-07-26 | 2016-07-26 | Flyback power converter with step-down voltage and constant flow at secondary side |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205847120U true CN205847120U (en) | 2016-12-28 |
Family
ID=57630257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620802542.5U Expired - Fee Related CN205847120U (en) | 2016-07-26 | 2016-07-28 | Secondary side voltage-reducing constant-current flyback power converter |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9674908B1 (en) |
| CN (1) | CN205847120U (en) |
| DE (1) | DE202016106688U1 (en) |
| TW (1) | TWM533373U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020052404A1 (en) * | 2018-09-14 | 2020-03-19 | 苏州瑞铬优电子科技有限公司 | Drive circuit for flicker-free led lighting having high power factor |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108024416B (en) * | 2017-12-21 | 2024-02-23 | 杭州必易微电子有限公司 | LED current ripple eliminating circuit |
| TWI691823B (en) * | 2018-02-23 | 2020-04-21 | 台達電子工業股份有限公司 | Power supply device and control method thereof |
| CN108462383B (en) * | 2018-04-16 | 2020-03-31 | 西华大学 | Isolated single-inductor two-stage power factor correction converter and control method thereof |
| CN108882450B (en) * | 2018-07-10 | 2023-08-01 | 赛尔富电子有限公司 | Limiting circuit for highest output power of constant-current LED power supply and constant-current LED power supply circuit |
| DE102018133151B4 (en) * | 2018-12-20 | 2021-01-21 | Vossloh-Schwabe Deutschland Gmbh | Operating circuit with two converter circuits and two separate control devices |
| TWI753637B (en) * | 2020-03-09 | 2022-01-21 | 通嘉科技股份有限公司 | Power factor correction controller and operational method thereof |
| CN114679071A (en) * | 2022-03-07 | 2022-06-28 | 昂宝电子（上海）有限公司 | Asymmetric half-bridge flyback switching power supply and control chip and control method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100438695B1 (en) * | 2001-03-09 | 2004-07-05 | 삼성전자주식회사 | Apparatus for controlling power supply and method thereof |
| JP5785710B2 (en) * | 2010-12-14 | 2015-09-30 | ローム株式会社 | DC / DC converter, power supply device using the same, and electronic device |
-
2016
- 2016-07-26 TW TW105211247U patent/TWM533373U/en not_active IP Right Cessation
- 2016-07-28 CN CN201620802542.5U patent/CN205847120U/en not_active Expired - Fee Related
- 2016-11-22 US US15/358,612 patent/US9674908B1/en active Active
- 2016-11-30 DE DE202016106688.3U patent/DE202016106688U1/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020052404A1 (en) * | 2018-09-14 | 2020-03-19 | 苏州瑞铬优电子科技有限公司 | Drive circuit for flicker-free led lighting having high power factor |
| US11304280B2 (en) | 2018-09-14 | 2022-04-12 | Suzhou Regu. Technology Inc. | Drive circuit for flicker-free LED lighting having high power factor |
Also Published As
| Publication number | Publication date |
|---|---|
| US9674908B1 (en) | 2017-06-06 |
| TWM533373U (en) | 2016-12-01 |
| DE202016106688U1 (en) | 2016-12-14 |
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